Pulley.



J. STEWART.,

, PULLEY. APPLICATION 111150 11111.20. 1912. RENEwED 110V. 12. 1911.

LQM., j l meme@ 116111.51918.

' as .anc.

JOHN STEWART, OF AURORA, ILLINOIS, ASSIGNOR T0 STEPHENS ADAMSONlVINFGl'. C., A CORPORATION OF ILLINOIS.

PULLEY.

-Specicatioaof Letters lPatent.

Patented Feb. 5, 1918.

Application led January 20, 1912, Serial lilo-672,446. Renewed November12, 1917. Serial No. 201,863.

l used in other situations.

Its objects are to provide an limproved mounting for the bearings uponwhich the pulley rotates, and an improved means 'for mounting the pulleyin a supporting bracket.

They invention is fully hereinafter described and is illustrated intheaccompanying drawings, in .which- Figure 1 is an end view of thesupporting bracket and a pulley mounted thereon;

Fig. e

of Fig. 1';

Fig. 3 isa detail perspective of the pulley'- detached from itssupporting bracket;

Fig. t is a perspective of a ball bearing casing or shell used inconnection with the pulley; :and

Fig. 'is a detail in perspective of the end plate and peripheral wall ofthe pulleybefore assembling.

The pulley comprises a body portion 10,

cylindrical in form and preferably of sheet metal, and ends 11, 12,which are preferably in the form of plates fitted to the ends of thecylinder, these end plates being centrally apertured and preferablyAbeing otherwise imperforate-the walls of the central apertures beingdrawn outwardly to form nipples or bosses, as shown Vat 13, 111, forreceiving and holding the shell as 15, 16 of a ball bear- Each ballbearing in its entirety comprises as shown, the said innershell 15 or 16and an outer L-shaped4 annulus, A23, inclosingthe said inner shell andwith it forming a race for balls 22. An annulus 17 fits snugly aroundthe annulus 23,- and has instanding marginal flanges for holding the twoelements of the shell together. f

A cap 30 inclosesthe ball bearing, and a rod 18, located on the axis ofthe pulley, is in threaded engagement with the cap 30 of cylinder 10 inany is a planv section on theline 2&2

the two ball bearing casings and ties them together.

The inner' annulus as 15, 16 of the ball bearing casing is of suchsizeas to lit snugly and be held frictionally upon the nipples or bosses13, 14. The outer annulus 28 is-rnovable with reference to the innerannulus,vbut is frictionally engaged and held against rotation by thecap 30.

, The end plates 11, 12, are attached to the suitable manner, thepreferred construction, however, being that shown, the diameter 4of theplates being such that'theywill fit snugly within the ends of thecylinder which are apertured, as shown at 19, to receive radial lugs 20ont the plates, the length of these lugs being substantially .equal tothe thickness of the cylinder wall so that Vtheir ends are flush withthe outer,

surface thereof. The recesses 19 are of greater depth than the thicknessof the plates, and after the latter are inserted the 'ends of thecylinder are .flanged inwardly,

as shown at 21, to overlap the .plates and securely lock them in place.

An annular outstanding rib 24 is formed up on the end plate 11, or 12,its internal diameter being such that it-receives the rim of the cap30.- The parts being thus assem bled, a rigid pulley is formed,'the endplates,"

even though of comparatively light sheet metal, being bound together bythe rod 18.

The pulley thus constructed is preferably mounted n a lll-shapedsupporting bracket 25, which may be made of sheet metal and is capableof being attached by suitable bolts, not shown, to the framework inconnection with which the pulley is to be employed. The ends of the armsof the bracket 25 are longitudinally recessed, as shown at 26, and theball bearing caps 30 are each provided with'a circumferential groove 27for receiving the edges of this recess, thereby Asecurely holding thepulley within the bracket and also, through the medium of the rod 18,locking the arms of the bracket together.

-The pulley thus formed, `while being cheap of construction, is light,yet possesses ample strength; and its ends being closed the accumulationof rubbish within its interior is prevented. Furthermore, the pul- -leyitself contributes to the rigidity of the supportng'bracket, renderingit possibleto construct the latter of light material. The device as aWhole is thus peculiarl Well adapted to serve as a unit in the be tconveyer mechanism which forms the Subject 'of an application Serial No.663,954, for Letters Patent, made by Wiley W. Stephens.

While the preferred construction is'herein 'shown and described, variousdetails may be modified in form Without departing from the scope of theinvention.

I claim as my invention,

1. In combination, a pair of longitudinally slotted bracket arms, apulley having centrally apertured end members, ball bearings surroundingthe apertures of the pulley ends, a rod located on the axis of thepulley and projecting beyond the bearings', and lat erally channeledheads on the rods fitting within the bracket slots. j

"2. In combination, a bracket hanger having longitudinally slottedparallel arms, a pulley having centrally apertured end members, ballbearings surrounding the apertures of the pulley ends, a rod located onthe axis of the pulley and projecting beyond the bearings, and laterallychanneled heads on the rods litting'within the bracketvslots.

3. In combinatlon, a pair of longitudinally slotted bracket arms, apulley having centrally apertured end members, and a rod extendingaxially through the pulley, the ends'of the rod projecting beyond thepulley ends and being provided With laterally recessed parts to t Withinthe slots of the V between the bracket arms.

JOHN STEWART. Witnesses:

.D C. A. KRAUSE,

O. P. CALKINS.

